At one time, the M50 engine was a real BMW favorite. He came to replace the M20 motor in 1991. New engine It was developed in two variations - 2.0 and 2.5 liters. However, his "life" was short-lived in the market: the release of "fifty-one" was discontinued in 1996, when a new modification arose with the aluminum block - it was assigned the M52 index.

Device M50.

The M50 engine was installed on the E34 and E36 model. In 1992 engineers concern BMW. Gave the M50 new system of gas distribution called Vanos. The main "china" of the innovation became the intake camshaft, which allowed to increase the engine thrust on low and medium turnover without loss in high.

The design is a standard 6-cylinder engine, which turned out to be a cast iron block with an aluminum head. However, compared with the predecessor M20, the BMW M50 was a rather impressive step forward: 24th valve system of gas distribution with two camshafts, driven by chain, and valve drives through hydrocomathers. The ignition system was also subject to change - it became entirely electronic, the rubber was removed behind unnecessaryness and added the ignition coil to each candle.

M50 became the most successful and reliable engines from BMW, so they received further life - on the basis of the M50, such modifications were collected as 3 liter M3Е36 with a capacity of 240 hp. and Alpina B3 with 250 hp The last option was intended for the American market. The weight of the engine was about 136 kg.

M50 modifications

disadvantages

Despite all the "luckyness" M50, it turned out to be not perfect, like all the "long" engines: with a strong overheating, the gas joint loses hermeticness, as a result of which cracks are formed on the GBC. Excessive oil consumption, which in normal operation is 1 l per 1000 km, is observed after 300-400 thousand km of mileage. The consequences are sad - exhaust valves burn, and in some cases, due to local overheating, cracks are formed between them.

Many spare parts manufacturers install plastic details In the water pump, which becomes the cause of the destruction of bearings and the impeller of the pump. Often with a low qualification of masters, the result of the repair is incorrectly established camshafts. The motors of the first anniversary of the release suffer from the failures of the ignition coils and cases of burnout by the power keys controlling the ignition. But the erosion of the liners is distributed less than that of 40 series engines. Many engines of 50 series observed leaks of oil - under the pads of the pallet, valve and front covers, by connecting the cylinder block with oil filter And the ring of probe.

Some M50 suffer from the disconnection of cylinders, which in turn ceases to supply fuel. To enable them, it is often required not only to eliminate the malfunction, but also to clean the memory. But at least these systems are not too much suffering from breakdowns associated with lambda probe - oxygen sensor.

Dignity

The M50 has a number of differences from the first generation motors, which, of course, has become a big step forward for BMW. It is this engine with its 4 valves to the cylinder founded the fashion on the "explosive" engines of German autohygigant, which reached the present day.

The M50 became the last unit in which the bunch of the "cast-iron block and an aluminum cylinder head", which was truly true and reliable design.

Also, the M50 set the popular standard "1 nm by 10 cm 3 cylinders", which was unattainable in the engines of the old series. The engine has perfectly adapted to 95 gasoline, which, however, not to say about 2 liter versions - it lacks even such octane number. But this problem is solved to some extent using detonation sensors. According to the results, despite the shortcomings inherent in him, the BMW M50 became the best in the history of the concern both technical and consumer data.

Engine operation BMW M50 (video)

Engine BMW. M50B25 / M50B25TU.

Engine characteristics M50B25

Reliability, problems and repair of the engine BMW M50B25

In 1990, a new, much more perfect and powerful, called the BMW M50B25, came to replace the popular and powerful, called BMW M50B25 (the people received a nickname "Plate"), from the new M50 family (the series also entered, M50B24,). The main difference between the M20 and M50 engines lies in the GBC, in the new engine, the head was replaced by a more perfect twin, 24-valve with hydrocomathers (valve adjustment does not threaten). Diameter inlet valves 33 mm, graduation 30.5 mm. The camshafts with phase 240/228 are used, the rise of 9.7 / 8.8 mm. And also applied an enhanced light intake manifold.
Engine control system Bosch Motronic 3.1.
The drive of the timing in new M50 motors has changed, now instead of the belt, a chain is used, the service life of 250 thousand km (as a rule goes more). In addition, individual ignition coils are used, the ignition system is electronic, other pistons, light rods with a long 135 mm. The size of the nozzles M50B25 - 190 CC.
Since 1992, M50 engines have received a widely known system for changing the phases of gas distribution on the Vanos intake shaft, and such motors began to be called M50B25TU (Technical Update). In addition, in these engines used new rods with a long 140 mm and pistons with a compression height of 32.55 mm (38.2 mm per M50B25).
The control system is replaced by Bosch Motronic 3.3.1.
These power units were used onbMW cars with index 25i.
Since 1995, the M50B25 engine began to be replaced with a new improved motor and in 1996 the release of the M50 series was completed.

Motor modifications BMW M50B25

1. M50B25 (1990 - 1992 G.V.) - Basic Engine. Degree of compression 10, Power 192 hp At 5900 rpm, torque 245 nm at 4700 rpm.
2. M50B25TU (1992 - 1996) - Added a system for changing the phases of gas distribution on the VANOS inlet, changed the connecting rod-piston group, and other camshafts are installed (phase 228/228, lifting 9/9 mm). Degree of compression 10.5, Power 192 hp at 5900 rpm, torque 245 nm at 4200 rpm.

Problems and disadvantages of BMW M50B25 engines

1. Overheating. The M50 engine is prone to overheating and transfers it quite hard, so if the motor began to warm up check the state of the radiator, as well as the pump and thermostat, the presence aerial traffic In the cooling system and the radiator lid.
2. Troit. Check the ignition coils, most often the problem is in them, as well as candles and nozzles.
3. Floating speed. Often the malfunction is caused by the failed valve idle move (Khh). Cleaning will help bring the motor in feeling. If the problem remains, then see the position sensor throttle valve (DPDZ), temperature sensor, lambda probe, clean the throttle.
4. M50 Vanya. The problem is expressed in the tapura, loss of power, rumble. Repair: Purchase Remkomplekt Vanos M50.
In addition, in view of its age and features of operation, the BMW M50 engines suffer from high oil consumption (up to 1 l per 1000 km), which is not too much declining after the overhaul. Can flow strips valve cover and the pallet, the leaks are not excluded and through oil Prope. Expansion tank Also loves to crack, after which we get leakage of antifreeze. At the same time, periodically problems deliver the M50 camshaft sensors, crankshaft (DPKV), coolant temperatures, and so on.
In spite of everything, the engine BMW M50B25 is one of the most reliable power aggregates Bavarian producer, and the bulk of the problems is caused by age and the style of operation of the motor. And even such engines rolling over 300-400 thousand km, and if the motor was used in gentle mode and was adequately serviced, its resource can pass far over 400 thousand km, because it was not for nothing that they received a reputation of millions.
Purchase engine M50B25. a good choice For swapp and subsequent revision with the use of turbocharger. Before talking about such solutions.

BMW M50B25 Engine Tuning

Stroker. Camshafts

The most simple and fast option to increase power using the factory components, this is the installation of a long-term crankshaft (strkin). In M50B25 (without Vanos), the knee of 89.6 mm rises. From the same motor you need to buy connecting rods, connecting rod liners, repair pistons, nozzles, and indigenous liners from M50.
We collect (the firmware can be left stock, but it is better to tune in) and go on a 3-liter M50B30, with a capacity of about 230 hp and a compression ratio of 10.
The same power can be obtained by purchasing the camshafts Schrick 264/256 and configuring the stock Motronic. As a result, we get 220-230 hp Borrow a fence of cold air, sports exhaust and get 230+ hp
The same camshafts on the M50B25 3.0, the strror will give about 250-260 hp.
To obtain maximum power with M50B30, it is necessary to buy Schrick camshafts 284/284, sixded inlet, nozzles from BMW S50, light flywheel, make a porting of the CFC, to buy an equilodleal exhaust manifold and direct-flow exhaust. After tuning, such M50B30 develops around 270-280 hp
If this is not enough, you can crush the block under pistons 86.4 mm from S50B32 and get a working volume 3.2. We buy camshafts and get about 260 hp
Vanosny M50B25 can be removed in a 2.8 liter engine, by installing crankshaft with a course of 84 mm and connecting rods from M52B28. Together with the firmware Siemens MS41, it will give +/- 220 hp, the degree of compression ~ 11.

M50B25 TURBO.

In the case when the atmospheric motor has little or the cost of its implementation is too large, you can organize a turbo version of the 2.5-liter motor. If the tuning is supposed to be budget, then the Chinese turbo whale on the basis of Garrett GT35 (or the other, with brains included), your choice. As an option, you can find a used TD05 turbine (or other), cook collector, collect all the paipings, clamps, boom, intercooler, and so on. Put everything on stock piston, pre-installing fat gasket GBC. Cometic, nozzles 440 ss, fuel pump Bosch 044, exhaust on 3 "pipe, Brain EFIS 3.1 (or Megasquirt), customize and 0.6 bar We will get about 300 hp On 1 bar ~ 400 hp
Something similar can be built by purchasing the KIT M50 compressor and installing it on the piston drain. The return from the compressor will be noticeably lower than that of the turbine.
Even more power can be obtained by purchasing and installing turbocts on the original Garrett GT35, pistons CP Pistons for compression ratio 8.5, Eagle rods, Arp bolts, productive nozzles (~ 550 CC). With such sets, you can raise the power up to 500++ hp Similar projects can be built on a 3-liter row.

Reliability, problems and repair of the engine BMW M50B25

In 1990, a new BMW M20B25 was replaced by a popular row six, a newly perfect and powerful, called BMW M50B25 (the nickname received the plate "plate"), from the new M50 family (the M50B20, M50B24, S50B30, S50B32 was also included in the series ). The main difference between the M20 and M50 engines lies in the GBC, in the new engine, the head was replaced by a more perfect twin, 24-valve with hydrocomathers (valve adjustment does not threaten).

The diameter of the inlet valves is 33 mm, graduation 30.5 mm. The camshafts with phase 240/228 are used, the rise of 9.7 / 8.8 mm. And also applied an enhanced light intake manifold. Engine control system Bosch Motronic 3.1. The drive of the timing in new M50 motors has changed, now instead of the belt, a chain is used, the service life of 250 thousand km (as a rule goes more). In addition, individual ignition coils are used, the ignition system is electronic, other pistons, light rods with a long 135 mm. The size of the nozzles M50B25 - 190 CC.

Since 1992, M50 engines have received a widely known system for changing the phases of gas distribution on the Vanos intake shaft, and such motors began to be called M50B25TU (Technical Update). In addition, in these engines used new rods with a long 140 mm and pistons with a compression height of 32.55 mm (38.2 mm per M50B25).

The control system is replaced by Bosch Motronic 3.3.1. These strength units were used on BMW cars with index 25i. Since 1995, the M50B25 engine began to be replaced with a new M52B25 enhanced motor and in 1996 the release of the M50 series was completed.

Motor modifications BMW M50B25

• M50B25 (1990 - 1992 G.V.) - Basic engine. Degree of compression 10, Power 192 hp At 5900 rpm, torque 245 nm at 4700 rpm.
• M50B25TU (1992 - 1996) - Added a system for changing the phases of gas distribution on the VANOS inlet, changed the connecting rod-piston group, and other camshafts are installed (phase 228/228, lifting 9/9 mm). Degree of compression 10.5, Power 192 hp at 5900 rpm, torque 245 nm at 4200 rpm.

The predecessor of which was the sensational E28. Even today, it is really worthy of attention a car that is very popular. It is safe to say that this is a kind of masterpiece. Let's look at specifications This model, we will find the strengths and weaknesses.

Salon and equipment

Today, not every car is so comfortable as E34. The fact is that the central console here is made in such a way that the driver can not only quickly, but also comfortably access all the necessary management bodies. As for the sensors, they are mounted in a "torpedo" very successful. During the movement, they are excellent. IN dark time The day does not need to look closely, as the backlight of the devices at the level. To eliminate freezing and fogging windows, air ducts are provided that there is not only on the front panel, but also the doors that in the complex gives good result. Already by the 90s, the transport was equipped with air conditioning and a safety cushion for the driver. In addition, it was possible to order a complete set with a cassette radio, the disks at that time were not yet. IN maximum configuration Mounted hatch on the electric drive and leather interior.

Installed engines on E34

While the car was not removed from production, 13 engines were proposed, 11 of which are gasoline. As for power, the scatter is large enough. Minimum - 115 horses for a gasoline engine and as much for diesel. It was also possible to purchase a car with a 340-strong engine, but it was an exclusive. At the very beginning it was planned to install a series of M20 and M30 of 2.0 / 2.5 and 3.0 / 3.5 liters. All these motors can be considered relatives, they have a belt drive, as well as two valves for each cylinder. The absence of hydrocompensators led to the fact that heat gaps were periodically required, but it was not a problem, since it was necessary to perform this kind of setting every 35,000-40,000 kilometers. Even less often it was necessary to perform a belt replacement, every 50,000-60,000 kilometers. It is difficult to say which M20 and M30 there were serious disadvantages, as the assembly was really high quality.

Engines BMW E34: M50 and M60

Already by 1990, in Munich decided to establish modified motors. Almost all the parameters, they won their predecessors. One of the weighty advantages was the presence of a Vanos gas distribution system. M50 had a working volume of 2.0 and 2.5 liters with a capacity of 150 and 192 horsepower respectively. The main task of the designers was an increase in power, torque and improvement of efficiency. To achieve all this, installed 4 valves for each cylinder, various modifications accelerated their filling. The resource of motors was also at the level. Under all operating requirements, the engine could pass about 600,000 kilometers. The main drawback is a high sensitivity to overheating, which is why the owners had to constantly monitor the state of the pump, thermostat and nozzles. It is recommended not to expect a complete failure of a certain Spare Parts of the BMW E34, but to replace it before the emergency state occurs.

Modifications of car

In 1991 was released all-wheel drive model. New modification "Five" produced with one gasoline engine 2.5 liter volume. Torque priority was given to rear wheelsSince there accounted for about 64%, the remaining 36% on the front. Almost all cars had a mechanical five-speed gearbox, which was less common automatic box on 5 steps. As for the service life, such as silent blocks, they are recommended to change every 55-60 thousand kilometers. Change every 40 thousand kilometers. It is impossible not to say about the steering hydraulicel, which immediately fell in love with drivers. Depending on speed vehicle The steering wheel could become harder or easier. This, of course, did not solve problems with a worm pair, which quickly failed, nevertheless, a sense of security and comfort appeared on the road. In principle, even in 2014 it is safe to say that the E34 is a complex in the car, but the level of reliability is at height. If you go on time, change consumables and care for the vehicle, then there will be no problems with it.

Specifications with manual gearbox

The vehicle is equipped with a 2.5-liter engine, which issues 192 horsepower. About 8.5 s machine can accelerate to 100 kilometers, and maximum speed It is 230 km / h. As for the fuel consumption, the car came out not so voracious, if you look at its power. On average, it is 9 liters per 100 km. The trunk is also quite spacious, its volume is 460 liters. You need to say what to please and fuel tankIn which you can fill 80 liters of fuel. Clearance is 120 millimeters. Today is popular and which includes the installation of sports crankshaft and other. All this allows you to get a high-speed car, but at the same time very economical. As for the cost, it depends on the body's condition, as well as under the hood. Most often options from 4 to 9 thousand dollars.

Conclusion

So we did short review E34. If you are standing before choosing, do not rush to make a decision. Do not pay attention to the engine size, better look at how the interior is preserved and in what state the vehicle assemblies and aggregates. To begin with, evaluate appearance BMW E34. In this case, it is advisable not to believe, but browse yourself, preferably with a specialist. So you can get an objective assessment, ride and make conclusions for yourself. Here, in principle, all that can be said about the legendary E34. Expensive repair with more than paying for durability and reliability of the vehicle, so you can not worry. It is necessary to pour only high-quality oil and gasoline, as any engine, be it m2 or M5, requires a careful relationship and good care.

Request spare parts Viber 89639932224

Engine BMW M50B20TU 206S2

In exchange of reliable, but morally obsolete engines M20 concerners of the BMW concern in 1990 developed a completely new six-cylinder row power unit, which received the designation M50. It became so successful that he served as the basis for a number of Bavarian motors of the following generations and had several modifications that differ from each other by the presence of additional nodes, systems, as well as the characteristics of the torque. M50 engines are equipped with two distributive treals and four valves for each of the cylinders. This made it possible to significantly increase the efficiency of using the fuel and air mixture and, as a result, increase the power of the motor. In addition, in order to increase the reliability, the belt drive of the gas distribution mechanism was replaced by chain. Cost 35,000 rubles.

Engine specifications M50B20TU (206S2)

Engine Model: M50B20TU (206S2)

Volume: 1991 cm3

Power: 150 hp

Number of cylinders: 6

Since 1992, the M50 power units began to be equipped with a branded system for changing the VANOS gas distribution phases, with which it was possible to significantly reduce fuel consumption and increase the torque (especially at low revs). These engines were produced up to 1995 and they equipped such models of BMW cars as E36 320, E36 325, E34 520 and E34 525.

As for such important characteristicsAs reliability and resource, they are at high levels at high levels of M50 power units. Masters Stations maintenance It is noted that the overwhelming majority of problems with them are caused by improper exploitation and the use of low-quality oil and fuel.